The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 2004
Filed:
Mar. 15, 2002
Applicant:
Inventors:
Munmaya K. Mishra, Richmond, VA (US);
Raymond G. Saxton, Hanover, VA (US);
Luis C. Salazar, Baton Rouge, LA (US);
Gary J. Spedale, Baton Rouge, LA (US);
Assignee:
Ethyl Corporation, Richmond, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L 2/700 ; C08L 2/704 ; C08L 9/00 ; C10L 1/16 ;
U.S. Cl.
CPC ...
C08L 2/700 ; C08L 2/704 ; C08L 9/00 ; C10L 1/16 ;
Abstract
The present invention relates to a polymer blend containing a high ethylene content ethylene-propylene copolymer and a lower ethylene content ethylene-propylene copolymer. The polymer blend of the present invention is useful for the preparation of viscosity index improvers with improved lower temperature properties relative to conventional viscosity index improvers.